Marine engine



FIG. 1 is a perspective view of a marine engine showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a bottom view thereof.

The shading in the Figures show contour and not surface ornamentation.

The broken lines in the Figures show portions of the marine engine that form no part of the claimed design. 

CLAIM The ornamental design for a marine engine, as shown and described. 